Monument to a forgotten NYC disaster that claimed the lives of 1,000.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

Site of the first pathological and bacteriological research facility in the United States.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

Play heads or tails with thousands of different coins.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

A Manhattan Episcopal church with an eerie underground crypt.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

The oldest living tree in Manhattan comes shrouded in sinister legend.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

Visit the monolithic tomb of America's most famous general.

New York City's only preserved family home from the 19th century.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A hidden "place of interment for gentlemen."

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.